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Construction Guide to Next Generation High Performance Walls in Climate Zones 3-5 - Part II: 2x4 Walls

Part II of this Construction Guide to High-Performance Walls in Climate Zones 3-5 provides straightforward and cost-effective strategies to construct durable, energy-efficient walls. It addresses walls constructed with 2x4 wood frame studs, wood structural panel (WSP) sheathing as wall bracing and added backing for foam sheathing, a layer of rigid foam sheathing insulation up to 1.5 inches thick over the WSP, and a cladding system installed over the foam sheathing in low-rise residential buildings up to three stories high. Walls with 2x6 framing are addressed in Part I of the Guide.

The addition of exterior insulation to standard 2x4 framing enables an easy transition from conventional 2x4 wall construction to a much more energy-efficient wall system that is effective at minimizing thermal bridging from framing members. Only minimal changes to detailing and cladding attachments are needed for the system detailed in this Guide.

Published:
2016